He was trying to forcibly take the flag and he hit off the hat, whilst calling the kid the n word. That was assault. He can send the kid to the principals office or home. He cannot do that.
George Lucas' wife is a big Chicago friend of the Obamas.
https://www.breitbart.com/border/2019/02/26/report-thousands-of-migrant-unaccompanied-minors-sexually-abused-while-in-u-s-custody/
Unaccompanied minors are being sexually abused. Lots of them.